Barcroft Sienna and Sierra Bernal are identical twins - but Sienna is half the size of her twin sister Sierra.The twins' mother Chrissy Bernal was six months into her pregnancy when she realised
Primordial Dwarf Alex Connerty with an averaged sized child of the same age
Charlotte Garside and her mum. Charlotte is the smallest girl in the world.
Rita Santana has big hopes for her little boy, Angelo, who was born with Russell-Silver Syndrome.
Primordial dwarfism comprises a group of rare disorders in which a fetus fails to grow normally, and lack of normal growth continues into adulthood.